Patent GB-703886-A (GB)
Abstract: 703,886. Calculating-apparatus; cash registers ; transfer mechanism. NATIONAL REGISTRIER KASSEN AUGSBURG GES. Feb. 1, 1952, No. 2695/52. Class 106 (1) A calculating machine has a pair of complementarily movable differential members in each order, a link directly coupling each member to an associated setting element and a selectively operable mechanism for shifting the totalizer from an addition position in which it co-operates with one set of setting elements into co-operative relationship with another set to perform subtraction. The machine shown is hand operated. Differential mechanism.-Differential members 31, 32, Fig. 3, on a shaft 24 are moved together to embrace the depressed key stem of the associated bank of keys by a member 36 which engages a link 33 coupled by pins 34, 35 to the members 31, 32 respectively. The members 36 are mounted on a rod 37 which is supported by arms 38 pivoted on a rod 39 and which carries rollers 40 engaged by cams 41 on a shaft 23. Depression of a key shifts a slide 83 so that a stud 82 therein rocks a zero stop 43 to an ineffective position. If no key is depressed, the member 32 is held stationary and the member 31 moves a maximum amount into contact with the zero stop. The members 32, 31 move in correspondence with the amount represented by the depressed key and the nines complement of that amount respectively. The rod 37 is restored by a cam 52 on the shaft 24 which engages a roller 51 in a bifurcated arm 50 guided on the shaft 24 and pivoted on the rod 37. Arms 48, 49 on the rod 37 carry studs which engage slots 44, 45 in the differential members 31, 32 to restore them. Pitmen 55 controlled by cams on the shaft 23 rock an aligning bar 53 into engagement with teeth on the members 31, 32, after they have been set to locate them in differential positions. A segment 60 on the shaft 24 is set by studs 61, 62 in the members 31, 32 and positions through a gear 63 and nested shafts Fig. 4 (not shown), a corresponding type wheel. The differential members 31, 32 are connected by links 86, 87 to actuating segments 88, 89, Fig. 5A, on a shaft 90 in such a way that the segments move in the same direction. The actuators 88, 89 drive the corresponding totalizer wheel through intermediate gears 92, 93 respectively which are rotatable on a short sleeve 92A secured to a corresponding arm 91 rockable about the shaft 90. Item indicators.-Each segment 60, Fig. 3, is coupled by a link 69 to a segment 70 which sets a gear 71 fast to a front indicator 72 and coupled through a nested shaft to a rear indicator, Fig. 4 (not shown). Totalizer.-The totalizer wheels 94, Figs. 3 and 5A, are rotatable on a shaft 95 forming with its supporting arms 97 a frame rockable about a shaft 149 and axially movable thereon to align the wheels 94 with either the wheels 92 or the wheels 93. Pawls 179 on the shaft 149 are normally withheld from the wheels 92, 93 by a rod 181 but engage the wheels when the totalizer is engaged. The totalizer wheels 94 are normally engaged by pawls 98 on a rod 99 of the totalizer frame but as the latter is rocked counter-clockwise to engage the totalizer, tails 100 of the pawls enter slots in a plate 101, against which they are urged, to disengage the pawls. Addition and subtraction.-The engagement of the totalizer is effected by a link 118, Fig. 11, pivoted to the totalizer frame and supported by a stud 161 in a lever 158. The link 118 and an offset bracket thereon carry three studs 115, 116, 117 in different vertical planes which co-operate respectively with inward projections on bifurcated arms of three levers 111 operated by three timing cams 104, 105, 106. Normally, the link 118 is so positioned that the stud 116 is in engagement with the lever 111 operated by the central cam 105 which is shaped to engage the totalizer during the return movement of the differential members. The totalizer wheels are aligned with the wheels 93, Fig. 5A, for addition but on depression of the subtract key 11, Fig. 8, a slide 144 is depressed to rock an arm 146 counter-clockwise about the shaft 90. The arm 146 has a bent-over end formed with a cam slot engaged by a roller carried by a sleeve secured to the totalizer frame so. that the latter is shifted axially to align the totalizer wheels 94 with the intermediate wheels 92 moved as described above in accordance with the nines complement of the amount set up on the keyboard. The nines complement is converted to the true complement as described in connection with the fugitive one arrangements. The subtract key is held depressed by a locking slide until-the end of the cycle when a spring 150 restores the totalizer frame-to the add position. Transfer mechanism.-At transfer, a tooth 124, Fig. 5A, carried by a sleeve secured to the totalizer wheel 94, rocks a lever 125 clockwise, a pawl 135 moving from between an offset tooth 137 and a tooth 127 on the lever to between teeth 137 and 261. The tooth 261 is thus moved into the path of teeth 128 on a disc 129 fast on the shaft 90 which is rotated through a partially toothed wheel of the driving mechanism near the end of a cycle. This rotation drives the lever 125 further clockwise, the pawl 135 moving over the tooth 261. During this movement, a pin 138 in the lever 125 co-operates with a cam slot in the arm 91 of next higher order to rock it clockwise and so move the intermediate wheels 92, 93 planet-wise around the segments 88, 89 to enter the transfer unit. The further clockwise movement of the lever 125 also moves teeth 132, fast to a gear 130 meshing with a segment 521 fast to the lever 125, into the path of teeth 133 on a disc 134 secured to the shaft 90. As the rotation of the latter is completed, the teeth 132 are engaged and the lever 125 and operated arm 91 are restored. Fugitive-one arrangements.-In each normal subtraction operation, the highest order totalizer wheel passes through the " transfer " position and parts similar to those of the transfer mechanism described above operate to enter one in the units order. This converts the nines complement to the true complement. When during subtraction a positive total becomes negative, the highest order wheel does not pass the transfer position so that the extra unit is not entered, thus allowing for the fugitive-one. When in addition the total becomes positive, the highest order wheel passes from "9" to "0" so that the mechanism enters the fugitive-one in the units order. Positive total and subtotal taking.-Depression of a total key 13, Fig. 8, rocks a lever 152 clockwise about its pivot 151 on the stem of a subtotal key 12. A shaft 155 is thus moved counterclockwise and an arm 157, Fig. 11, thereon rocks the lever 158 to raise the link 118 (described above), so that the stud 117 is engaged by that lever 111 which is operated by the cam 106. The link 118 is thus moved to engage the totalizer during the first part of the cycle only and the totalizer wheels are reversely driven by the differential mechanism until the transfer teeth 124, Fig. 5A, abut the levers 125. Depression of either the total key or the subtotal key operates a slide, Fig. 9 (not shown), which rocks a bail 171, Fig. 3, to operate the slides 83 so as to render the zero stops ineffective. When the subtotal key 12 is depressed, the lever 152 is rocked counter-clockwise about its pivot 156 on the stem of the total key 13 and the shaft 155 is rocked clockwise to lower the link 118 and move the stud 115 into co-operation with the lever 111 which is operated by the cam 104. The totalizer is thus engaged throughout the operation and restoration of the differential mechanism. Negative total and subtotal taking.-If the total or sub-total key is operated when the total is negative, the totalizer is shifted to the subtraction position automatically and the wheels are reversely driven through the intermediate wheels 92, Fig. 5A, by the complementary segments 89. When the total is negative, the highest order wheel (an additional wheel) stands at " 9 " and a cam disc 184, Fig. 11, secured to a gear which meshes with the highest order wheel in both addition and subtraction operations, is positioned so that a stud 186 in an arm 187 on the rod 102 is in an innermost portion of a cam slot formed in the disc 184. The rod 102 is thus in a counterclockwise position and a slide 190, Fig. 8, coupled therewith by a link 189 and arm 188, is in an upper position. Pins 194, 195 in the slide 190 engage cam slots in plates 192, 193 pivoted on the subtraction slide 144 and when the slide 190 is in its upper position, these plates are in rocked positions in the path of studs 198, 199 in the subtotal and total keys 12, 13. Thus depression of either of these keys will operate the slide 144 and shift the totalizer to the subtraction position.